1 /* crypto/engine/hw_cswift.c */
2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 1999-2001 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
60 #include <openssl/crypto.h>
62 #include <openssl/dso.h>
63 #include <openssl/engine.h>
66 #ifndef OPENSSL_NO_HW_CSWIFT
68 /* Attribution notice: Rainbow have generously allowed me to reproduce
69 * the necessary definitions here from their API. This means the support
70 * can build independently of whether application builders have the
71 * API or hardware. This will allow developers to easily produce software
72 * that has latent hardware support for any users that have accelerators
73 * installed, without the developers themselves needing anything extra.
75 * I have only clipped the parts from the CryptoSwift header files that
76 * are (or seem) relevant to the CryptoSwift support code. This is
77 * simply to keep the file sizes reasonable.
83 #include "vendor_defns/cswift.h"
86 #define CSWIFT_LIB_NAME "cswift engine"
87 #include "hw_cswift_err.c"
89 static int cswift_destroy(ENGINE *e);
90 static int cswift_init(ENGINE *e);
91 static int cswift_finish(ENGINE *e);
92 static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)());
95 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
96 const BIGNUM *m, BN_CTX *ctx);
97 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
98 const BIGNUM *q, const BIGNUM *dmp1, const BIGNUM *dmq1,
99 const BIGNUM *iqmp, BN_CTX *ctx);
101 #ifndef OPENSSL_NO_RSA
103 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa);
105 /* This function is aliased to mod_exp (with the mont stuff dropped). */
106 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
107 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
109 #ifndef OPENSSL_NO_DSA
111 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa);
112 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
113 DSA_SIG *sig, DSA *dsa);
116 #ifndef OPENSSL_NO_DH
118 /* This function is alised to mod_exp (with the DH and mont dropped). */
119 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
120 const BIGNUM *a, const BIGNUM *p,
121 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
125 static int cswift_rand_bytes(unsigned char *buf, int num);
126 static int cswift_rand_status(void);
128 /* The definitions for control commands specific to this engine */
129 #define CSWIFT_CMD_SO_PATH ENGINE_CMD_BASE
130 static const ENGINE_CMD_DEFN cswift_cmd_defns[] = {
133 "Specifies the path to the 'cswift' shared library",
134 ENGINE_CMD_FLAG_STRING},
138 #ifndef OPENSSL_NO_RSA
139 /* Our internal RSA_METHOD that we provide pointers to */
140 static RSA_METHOD cswift_rsa =
142 "CryptoSwift RSA method",
158 #ifndef OPENSSL_NO_DSA
159 /* Our internal DSA_METHOD that we provide pointers to */
160 static DSA_METHOD cswift_dsa =
162 "CryptoSwift DSA method",
164 NULL, /* dsa_sign_setup */
166 NULL, /* dsa_mod_exp */
167 NULL, /* bn_mod_exp */
175 #ifndef OPENSSL_NO_DH
176 /* Our internal DH_METHOD that we provide pointers to */
177 static DH_METHOD cswift_dh =
179 "CryptoSwift DH method",
190 static RAND_METHOD cswift_random =
192 /* "CryptoSwift RAND method", */
202 /* Constants used when creating the ENGINE */
203 static const char *engine_cswift_id = "cswift";
204 static const char *engine_cswift_name = "CryptoSwift hardware engine support";
206 /* This internal function is used by ENGINE_cswift() and possibly by the
207 * "dynamic" ENGINE support too */
208 static int bind_helper(ENGINE *e)
210 #ifndef OPENSSL_NO_RSA
211 const RSA_METHOD *meth1;
213 #ifndef OPENSSL_NO_DH
214 const DH_METHOD *meth2;
216 if(!ENGINE_set_id(e, engine_cswift_id) ||
217 !ENGINE_set_name(e, engine_cswift_name) ||
218 #ifndef OPENSSL_NO_RSA
219 !ENGINE_set_RSA(e, &cswift_rsa) ||
221 #ifndef OPENSSL_NO_DSA
222 !ENGINE_set_DSA(e, &cswift_dsa) ||
224 #ifndef OPENSSL_NO_DH
225 !ENGINE_set_DH(e, &cswift_dh) ||
227 !ENGINE_set_RAND(e, &cswift_random) ||
228 !ENGINE_set_destroy_function(e, cswift_destroy) ||
229 !ENGINE_set_init_function(e, cswift_init) ||
230 !ENGINE_set_finish_function(e, cswift_finish) ||
231 !ENGINE_set_ctrl_function(e, cswift_ctrl) ||
232 !ENGINE_set_cmd_defns(e, cswift_cmd_defns))
235 #ifndef OPENSSL_NO_RSA
236 /* We know that the "PKCS1_SSLeay()" functions hook properly
237 * to the cswift-specific mod_exp and mod_exp_crt so we use
238 * those functions. NB: We don't use ENGINE_openssl() or
239 * anything "more generic" because something like the RSAref
240 * code may not hook properly, and if you own one of these
241 * cards then you have the right to do RSA operations on it
243 meth1 = RSA_PKCS1_SSLeay();
244 cswift_rsa.rsa_pub_enc = meth1->rsa_pub_enc;
245 cswift_rsa.rsa_pub_dec = meth1->rsa_pub_dec;
246 cswift_rsa.rsa_priv_enc = meth1->rsa_priv_enc;
247 cswift_rsa.rsa_priv_dec = meth1->rsa_priv_dec;
250 #ifndef OPENSSL_NO_DH
251 /* Much the same for Diffie-Hellman */
252 meth2 = DH_OpenSSL();
253 cswift_dh.generate_key = meth2->generate_key;
254 cswift_dh.compute_key = meth2->compute_key;
257 /* Ensure the cswift error handling is set up */
258 ERR_load_CSWIFT_strings();
262 #ifndef ENGINE_DYNAMIC_SUPPORT
263 static ENGINE *engine_cswift(void)
265 ENGINE *ret = ENGINE_new();
268 if(!bind_helper(ret))
276 void ENGINE_load_cswift(void)
278 /* Copied from eng_[openssl|dyn].c */
279 ENGINE *toadd = engine_cswift();
287 /* This is a process-global DSO handle used for loading and unloading
288 * the CryptoSwift library. NB: This is only set (or unset) during an
289 * init() or finish() call (reference counts permitting) and they're
290 * operating with global locks, so this should be thread-safe
292 static DSO *cswift_dso = NULL;
294 /* These are the function pointers that are (un)set when the library has
295 * successfully (un)loaded. */
296 t_swAcquireAccContext *p_CSwift_AcquireAccContext = NULL;
297 t_swAttachKeyParam *p_CSwift_AttachKeyParam = NULL;
298 t_swSimpleRequest *p_CSwift_SimpleRequest = NULL;
299 t_swReleaseAccContext *p_CSwift_ReleaseAccContext = NULL;
301 /* Used in the DSO operations. */
302 static const char *CSWIFT_LIBNAME = NULL;
303 static const char *get_CSWIFT_LIBNAME(void)
306 return CSWIFT_LIBNAME;
309 static void free_CSWIFT_LIBNAME(void)
312 OPENSSL_free((void*)CSWIFT_LIBNAME);
313 CSWIFT_LIBNAME = NULL;
315 static long set_CSWIFT_LIBNAME(const char *name)
317 free_CSWIFT_LIBNAME();
318 return (((CSWIFT_LIBNAME = BUF_strdup(name)) != NULL) ? 1 : 0);
320 static const char *CSWIFT_F1 = "swAcquireAccContext";
321 static const char *CSWIFT_F2 = "swAttachKeyParam";
322 static const char *CSWIFT_F3 = "swSimpleRequest";
323 static const char *CSWIFT_F4 = "swReleaseAccContext";
326 /* CryptoSwift library functions and mechanics - these are used by the
327 * higher-level functions further down. NB: As and where there's no
328 * error checking, take a look lower down where these functions are
329 * called, the checking and error handling is probably down there. */
331 /* utility function to obtain a context */
332 static int get_context(SW_CONTEXT_HANDLE *hac)
336 status = p_CSwift_AcquireAccContext(hac);
342 /* similarly to release one. */
343 static void release_context(SW_CONTEXT_HANDLE hac)
345 p_CSwift_ReleaseAccContext(hac);
348 /* Destructor (complements the "ENGINE_cswift()" constructor) */
349 static int cswift_destroy(ENGINE *e)
351 free_CSWIFT_LIBNAME();
352 ERR_unload_CSWIFT_strings();
356 /* (de)initialisation functions. */
357 static int cswift_init(ENGINE *e)
359 SW_CONTEXT_HANDLE hac;
360 t_swAcquireAccContext *p1;
361 t_swAttachKeyParam *p2;
362 t_swSimpleRequest *p3;
363 t_swReleaseAccContext *p4;
365 if(cswift_dso != NULL)
367 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_ALREADY_LOADED);
370 /* Attempt to load libswift.so/swift.dll/whatever. */
371 cswift_dso = DSO_load(NULL, get_CSWIFT_LIBNAME(), NULL, 0);
372 if(cswift_dso == NULL)
374 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
377 if(!(p1 = (t_swAcquireAccContext *)
378 DSO_bind_func(cswift_dso, CSWIFT_F1)) ||
379 !(p2 = (t_swAttachKeyParam *)
380 DSO_bind_func(cswift_dso, CSWIFT_F2)) ||
381 !(p3 = (t_swSimpleRequest *)
382 DSO_bind_func(cswift_dso, CSWIFT_F3)) ||
383 !(p4 = (t_swReleaseAccContext *)
384 DSO_bind_func(cswift_dso, CSWIFT_F4)))
386 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_NOT_LOADED);
389 /* Copy the pointers */
390 p_CSwift_AcquireAccContext = p1;
391 p_CSwift_AttachKeyParam = p2;
392 p_CSwift_SimpleRequest = p3;
393 p_CSwift_ReleaseAccContext = p4;
394 /* Try and get a context - if not, we may have a DSO but no
396 if(!get_context(&hac))
398 CSWIFTerr(CSWIFT_F_CSWIFT_INIT,CSWIFT_R_UNIT_FAILURE);
401 release_context(hac);
402 /* Everything's fine. */
406 DSO_free(cswift_dso);
407 p_CSwift_AcquireAccContext = NULL;
408 p_CSwift_AttachKeyParam = NULL;
409 p_CSwift_SimpleRequest = NULL;
410 p_CSwift_ReleaseAccContext = NULL;
414 static int cswift_finish(ENGINE *e)
416 free_CSWIFT_LIBNAME();
417 if(cswift_dso == NULL)
419 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_NOT_LOADED);
422 if(!DSO_free(cswift_dso))
424 CSWIFTerr(CSWIFT_F_CSWIFT_FINISH,CSWIFT_R_UNIT_FAILURE);
428 p_CSwift_AcquireAccContext = NULL;
429 p_CSwift_AttachKeyParam = NULL;
430 p_CSwift_SimpleRequest = NULL;
431 p_CSwift_ReleaseAccContext = NULL;
435 static int cswift_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)())
437 int initialised = ((cswift_dso == NULL) ? 0 : 1);
440 case CSWIFT_CMD_SO_PATH:
443 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,ERR_R_PASSED_NULL_PARAMETER);
448 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_ALREADY_LOADED);
451 return set_CSWIFT_LIBNAME((const char *)p);
455 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL,CSWIFT_R_CTRL_COMMAND_NOT_IMPLEMENTED);
459 /* Un petit mod_exp */
460 static int cswift_mod_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
461 const BIGNUM *m, BN_CTX *ctx)
463 /* I need somewhere to store temporary serialised values for
464 * use with the CryptoSwift API calls. A neat cheat - I'll use
465 * BIGNUMs from the BN_CTX but access their arrays directly as
466 * byte arrays <grin>. This way I don't have to clean anything
473 SW_LARGENUMBER arg, res;
475 SW_CONTEXT_HANDLE hac;
476 int to_return, acquired;
478 modulus = exponent = argument = result = NULL;
479 to_return = 0; /* expect failure */
482 if(!get_context(&hac))
484 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_UNIT_FAILURE);
488 /* Prepare the params */
490 modulus = BN_CTX_get(ctx);
491 exponent = BN_CTX_get(ctx);
492 argument = BN_CTX_get(ctx);
493 result = BN_CTX_get(ctx);
496 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_CTX_FULL);
499 if(!bn_wexpand(modulus, m->top) || !bn_wexpand(exponent, p->top) ||
500 !bn_wexpand(argument, a->top) || !bn_wexpand(result, m->top))
502 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BN_EXPAND_FAIL);
505 sw_param.type = SW_ALG_EXP;
506 sw_param.up.exp.modulus.nbytes = BN_bn2bin(m,
507 (unsigned char *)modulus->d);
508 sw_param.up.exp.modulus.value = (unsigned char *)modulus->d;
509 sw_param.up.exp.exponent.nbytes = BN_bn2bin(p,
510 (unsigned char *)exponent->d);
511 sw_param.up.exp.exponent.value = (unsigned char *)exponent->d;
512 /* Attach the key params */
513 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
518 case SW_ERR_INPUT_SIZE:
519 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_BAD_KEY_SIZE);
523 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
524 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
525 sprintf(tmpbuf, "%ld", sw_status);
526 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
530 /* Prepare the argument and response */
531 arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
532 arg.value = (unsigned char *)argument->d;
533 res.nbytes = BN_num_bytes(m);
534 memset(result->d, 0, res.nbytes);
535 res.value = (unsigned char *)result->d;
536 /* Perform the operation */
537 if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP, &arg, 1,
540 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
541 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP,CSWIFT_R_REQUEST_FAILED);
542 sprintf(tmpbuf, "%ld", sw_status);
543 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
546 /* Convert the response */
547 BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
551 release_context(hac);
556 /* Un petit mod_exp chinois */
557 static int cswift_mod_exp_crt(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
558 const BIGNUM *q, const BIGNUM *dmp1,
559 const BIGNUM *dmq1, const BIGNUM *iqmp, BN_CTX *ctx)
562 SW_LARGENUMBER arg, res;
564 SW_CONTEXT_HANDLE hac;
565 BIGNUM *rsa_p = NULL;
566 BIGNUM *rsa_q = NULL;
567 BIGNUM *rsa_dmp1 = NULL;
568 BIGNUM *rsa_dmq1 = NULL;
569 BIGNUM *rsa_iqmp = NULL;
570 BIGNUM *argument = NULL;
571 BIGNUM *result = NULL;
572 int to_return = 0; /* expect failure */
575 if(!get_context(&hac))
577 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_UNIT_FAILURE);
581 /* Prepare the params */
583 rsa_p = BN_CTX_get(ctx);
584 rsa_q = BN_CTX_get(ctx);
585 rsa_dmp1 = BN_CTX_get(ctx);
586 rsa_dmq1 = BN_CTX_get(ctx);
587 rsa_iqmp = BN_CTX_get(ctx);
588 argument = BN_CTX_get(ctx);
589 result = BN_CTX_get(ctx);
592 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_CTX_FULL);
595 if(!bn_wexpand(rsa_p, p->top) || !bn_wexpand(rsa_q, q->top) ||
596 !bn_wexpand(rsa_dmp1, dmp1->top) ||
597 !bn_wexpand(rsa_dmq1, dmq1->top) ||
598 !bn_wexpand(rsa_iqmp, iqmp->top) ||
599 !bn_wexpand(argument, a->top) ||
600 !bn_wexpand(result, p->top + q->top))
602 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BN_EXPAND_FAIL);
605 sw_param.type = SW_ALG_CRT;
606 sw_param.up.crt.p.nbytes = BN_bn2bin(p, (unsigned char *)rsa_p->d);
607 sw_param.up.crt.p.value = (unsigned char *)rsa_p->d;
608 sw_param.up.crt.q.nbytes = BN_bn2bin(q, (unsigned char *)rsa_q->d);
609 sw_param.up.crt.q.value = (unsigned char *)rsa_q->d;
610 sw_param.up.crt.dmp1.nbytes = BN_bn2bin(dmp1,
611 (unsigned char *)rsa_dmp1->d);
612 sw_param.up.crt.dmp1.value = (unsigned char *)rsa_dmp1->d;
613 sw_param.up.crt.dmq1.nbytes = BN_bn2bin(dmq1,
614 (unsigned char *)rsa_dmq1->d);
615 sw_param.up.crt.dmq1.value = (unsigned char *)rsa_dmq1->d;
616 sw_param.up.crt.iqmp.nbytes = BN_bn2bin(iqmp,
617 (unsigned char *)rsa_iqmp->d);
618 sw_param.up.crt.iqmp.value = (unsigned char *)rsa_iqmp->d;
619 /* Attach the key params */
620 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
625 case SW_ERR_INPUT_SIZE:
626 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_BAD_KEY_SIZE);
630 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
631 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
632 sprintf(tmpbuf, "%ld", sw_status);
633 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
637 /* Prepare the argument and response */
638 arg.nbytes = BN_bn2bin(a, (unsigned char *)argument->d);
639 arg.value = (unsigned char *)argument->d;
640 res.nbytes = 2 * BN_num_bytes(p);
641 memset(result->d, 0, res.nbytes);
642 res.value = (unsigned char *)result->d;
643 /* Perform the operation */
644 if((sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_MODEXP_CRT, &arg, 1,
647 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
648 CSWIFTerr(CSWIFT_F_CSWIFT_MOD_EXP_CRT,CSWIFT_R_REQUEST_FAILED);
649 sprintf(tmpbuf, "%ld", sw_status);
650 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
653 /* Convert the response */
654 BN_bin2bn((unsigned char *)result->d, res.nbytes, r);
658 release_context(hac);
663 #ifndef OPENSSL_NO_RSA
664 static int cswift_rsa_mod_exp(BIGNUM *r0, const BIGNUM *I, RSA *rsa)
669 if((ctx = BN_CTX_new()) == NULL)
671 if(!rsa->p || !rsa->q || !rsa->dmp1 || !rsa->dmq1 || !rsa->iqmp)
673 CSWIFTerr(CSWIFT_F_CSWIFT_RSA_MOD_EXP,CSWIFT_R_MISSING_KEY_COMPONENTS);
676 to_return = cswift_mod_exp_crt(r0, I, rsa->p, rsa->q, rsa->dmp1,
677 rsa->dmq1, rsa->iqmp, ctx);
685 /* This function is aliased to mod_exp (with the mont stuff dropped). */
686 static int cswift_mod_exp_mont(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
687 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
689 return cswift_mod_exp(r, a, p, m, ctx);
692 #ifndef OPENSSL_NO_DSA
693 static DSA_SIG *cswift_dsa_sign(const unsigned char *dgst, int dlen, DSA *dsa)
695 SW_CONTEXT_HANDLE hac;
698 SW_LARGENUMBER arg, res;
701 BIGNUM *dsa_p = NULL;
702 BIGNUM *dsa_q = NULL;
703 BIGNUM *dsa_g = NULL;
704 BIGNUM *dsa_key = NULL;
705 BIGNUM *result = NULL;
706 DSA_SIG *to_return = NULL;
709 if((ctx = BN_CTX_new()) == NULL)
711 if(!get_context(&hac))
713 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_UNIT_FAILURE);
717 /* Prepare the params */
719 dsa_p = BN_CTX_get(ctx);
720 dsa_q = BN_CTX_get(ctx);
721 dsa_g = BN_CTX_get(ctx);
722 dsa_key = BN_CTX_get(ctx);
723 result = BN_CTX_get(ctx);
726 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_CTX_FULL);
729 if(!bn_wexpand(dsa_p, dsa->p->top) ||
730 !bn_wexpand(dsa_q, dsa->q->top) ||
731 !bn_wexpand(dsa_g, dsa->g->top) ||
732 !bn_wexpand(dsa_key, dsa->priv_key->top) ||
733 !bn_wexpand(result, dsa->p->top))
735 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BN_EXPAND_FAIL);
738 sw_param.type = SW_ALG_DSA;
739 sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
740 (unsigned char *)dsa_p->d);
741 sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
742 sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
743 (unsigned char *)dsa_q->d);
744 sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
745 sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
746 (unsigned char *)dsa_g->d);
747 sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
748 sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->priv_key,
749 (unsigned char *)dsa_key->d);
750 sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
751 /* Attach the key params */
752 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
757 case SW_ERR_INPUT_SIZE:
758 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_BAD_KEY_SIZE);
762 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
763 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
764 sprintf(tmpbuf, "%ld", sw_status);
765 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
769 /* Prepare the argument and response */
771 arg.value = (unsigned char *)dgst;
772 res.nbytes = BN_num_bytes(dsa->p);
773 memset(result->d, 0, res.nbytes);
774 res.value = (unsigned char *)result->d;
775 /* Perform the operation */
776 sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_SIGN, &arg, 1,
778 if(sw_status != SW_OK)
780 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
781 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_SIGN,CSWIFT_R_REQUEST_FAILED);
782 sprintf(tmpbuf, "%ld", sw_status);
783 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
786 /* Convert the response */
787 ptr = (unsigned char *)result->d;
788 if((to_return = DSA_SIG_new()) == NULL)
790 to_return->r = BN_bin2bn((unsigned char *)result->d, 20, NULL);
791 to_return->s = BN_bin2bn((unsigned char *)result->d + 20, 20, NULL);
795 release_context(hac);
804 static int cswift_dsa_verify(const unsigned char *dgst, int dgst_len,
805 DSA_SIG *sig, DSA *dsa)
807 SW_CONTEXT_HANDLE hac;
810 SW_LARGENUMBER arg[2], res;
811 unsigned long sig_result;
813 BIGNUM *dsa_p = NULL;
814 BIGNUM *dsa_q = NULL;
815 BIGNUM *dsa_g = NULL;
816 BIGNUM *dsa_key = NULL;
817 BIGNUM *argument = NULL;
821 if((ctx = BN_CTX_new()) == NULL)
823 if(!get_context(&hac))
825 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_UNIT_FAILURE);
829 /* Prepare the params */
831 dsa_p = BN_CTX_get(ctx);
832 dsa_q = BN_CTX_get(ctx);
833 dsa_g = BN_CTX_get(ctx);
834 dsa_key = BN_CTX_get(ctx);
835 argument = BN_CTX_get(ctx);
838 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_CTX_FULL);
841 if(!bn_wexpand(dsa_p, dsa->p->top) ||
842 !bn_wexpand(dsa_q, dsa->q->top) ||
843 !bn_wexpand(dsa_g, dsa->g->top) ||
844 !bn_wexpand(dsa_key, dsa->pub_key->top) ||
845 !bn_wexpand(argument, 40))
847 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BN_EXPAND_FAIL);
850 sw_param.type = SW_ALG_DSA;
851 sw_param.up.dsa.p.nbytes = BN_bn2bin(dsa->p,
852 (unsigned char *)dsa_p->d);
853 sw_param.up.dsa.p.value = (unsigned char *)dsa_p->d;
854 sw_param.up.dsa.q.nbytes = BN_bn2bin(dsa->q,
855 (unsigned char *)dsa_q->d);
856 sw_param.up.dsa.q.value = (unsigned char *)dsa_q->d;
857 sw_param.up.dsa.g.nbytes = BN_bn2bin(dsa->g,
858 (unsigned char *)dsa_g->d);
859 sw_param.up.dsa.g.value = (unsigned char *)dsa_g->d;
860 sw_param.up.dsa.key.nbytes = BN_bn2bin(dsa->pub_key,
861 (unsigned char *)dsa_key->d);
862 sw_param.up.dsa.key.value = (unsigned char *)dsa_key->d;
863 /* Attach the key params */
864 sw_status = p_CSwift_AttachKeyParam(hac, &sw_param);
869 case SW_ERR_INPUT_SIZE:
870 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_BAD_KEY_SIZE);
874 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
875 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
876 sprintf(tmpbuf, "%ld", sw_status);
877 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
881 /* Prepare the argument and response */
882 arg[0].nbytes = dgst_len;
883 arg[0].value = (unsigned char *)dgst;
885 arg[1].value = (unsigned char *)argument->d;
886 memset(arg[1].value, 0, 40);
887 BN_bn2bin(sig->r, arg[1].value + 20 - BN_num_bytes(sig->r));
888 BN_bn2bin(sig->s, arg[1].value + 40 - BN_num_bytes(sig->s));
889 res.nbytes = 4; /* unsigned long */
890 res.value = (unsigned char *)(&sig_result);
891 /* Perform the operation */
892 sw_status = p_CSwift_SimpleRequest(hac, SW_CMD_DSS_VERIFY, arg, 2,
894 if(sw_status != SW_OK)
896 char tmpbuf[DECIMAL_SIZE(sw_status)+1];
897 CSWIFTerr(CSWIFT_F_CSWIFT_DSA_VERIFY,CSWIFT_R_REQUEST_FAILED);
898 sprintf(tmpbuf, "%ld", sw_status);
899 ERR_add_error_data(2, "CryptoSwift error number is ",tmpbuf);
902 /* Convert the response */
903 to_return = ((sig_result == 0) ? 0 : 1);
907 release_context(hac);
917 #ifndef OPENSSL_NO_DH
918 /* This function is aliased to mod_exp (with the dh and mont dropped). */
919 static int cswift_mod_exp_dh(const DH *dh, BIGNUM *r,
920 const BIGNUM *a, const BIGNUM *p,
921 const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx)
923 return cswift_mod_exp(r, a, p, m, ctx);
927 /* Random bytes are good */
928 static int cswift_rand_bytes(unsigned char *buf, int num)
930 SW_CONTEXT_HANDLE hac;
932 SW_LARGENUMBER largenum;
935 int to_return = 0; /* assume failure */
937 if (!get_context(&hac))
939 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL, CSWIFT_R_UNIT_FAILURE);
944 while (nbytes < (size_t)num)
946 /* tell CryptoSwift how many bytes we want and where we want it.
947 * Note: - CryptoSwift cannot do more than 4096 bytes at a time.
948 * - CryptoSwift can only do multiple of 32-bits. */
949 largenum.value = (SW_BYTE *) buf + nbytes;
950 if (4096 > num - nbytes)
951 largenum.nbytes = num - nbytes;
953 largenum.nbytes = 4096;
955 swrc = p_CSwift_SimpleRequest(hac, SW_CMD_RAND, NULL, 0, &largenum, 1);
959 CSWIFTerr(CSWIFT_F_CSWIFT_CTRL, CSWIFT_R_REQUEST_FAILED);
960 sprintf(tmpbuf, "%ld", swrc);
961 ERR_add_error_data(2, "CryptoSwift error number is ", tmpbuf);
965 nbytes += largenum.nbytes;
967 to_return = 1; /* success */
971 release_context(hac);
975 static int cswift_rand_status(void)
981 /* This stuff is needed if this ENGINE is being compiled into a self-contained
983 #ifdef ENGINE_DYNAMIC_SUPPORT
984 static int bind_fn(ENGINE *e, const char *id)
986 if(id && (strcmp(id, engine_cswift_id) != 0))
992 IMPLEMENT_DYNAMIC_CHECK_FN()
993 IMPLEMENT_DYNAMIC_BIND_FN(bind_fn)
994 #endif /* ENGINE_DYNAMIC_SUPPORT */
996 #endif /* !OPENSSL_NO_HW_CSWIFT */
997 #endif /* !OPENSSL_NO_HW */